Shoe insertion.



R. LACK.

SHOE INSERTION.

APPLICATION FILED JUNE 15, 1914.

Patented Apr, 6, 1915..

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RUDOLF LACK, OF BERLIN, GERMANY.

SHOE INSERT'ION.

Specification of Letters Patent.

Patented Apr. 6, 1915.

Application filed June 15, 1914.. Serial No. 845,263.

To all whom it may concern: Be it known that I, RunoLr LACK, a c tizen of the Republic of Switzerland, residing at Berlin, Germany, have invented certain new and useful Improvements in Shoe Insertions, of which the following is a specifi: cation.

This invention relates to an insertion or sock, for boots and shoes, having means for ventilation and a pipe for the admission of air.

The invention has for its object to improve the admission to the boot and discharge therefrom of air and to arrange the insertion or sock in such manner that it can be employed in any suitable boots or shoes which have no grooves or recesses for receiving air pipes.

The invention is illustrated in the accompanying drawings in which Figure l is a top view, Fig. 2 a cross section on the line A--A of Fig. 1 on an enlarged scale and Fig. 3 a cross section on an enlarged scale on the line BB of Fig. 1; Fig. 4 is a longitudinal section of the hollow part of chamber of the sock and Fig. 5

a cross section of a detail on the line of Fig. 2.

The sock or lining consists preferably of vulcanized fiber. It may, however, be made of rubber, wood or other suitable materials which are as air tight as possible. The chamber or hollow part 1 of the insert-ion is air-tightly inclosed above by a wall 2 and at the bottom by a wall 3 and at the periphery by a packing strip 4. The wall 2 forms the rest or support for the foot. The packing strip is preferably made of rubber. Resilient members are arranged between the walls 2 and 3 and allow of the sock being compressed and when the foot is raised separate the walls 2 and 3 .so that air is drawn into the hollow part of the sock.

In accordance with the invention is in troduced by means of a band-like tube 6 which is attached to the sock and may be inserted together with the latter into the shoe or removed therefrom and changed. The band 6 is air-tightly secured in the insertion at 7 When the boot or shoe which is provided with the insertion is drawn on the band lies between the foot and the walls of the shoe or boot. v

In order to keep open the section of passage of the band even under the greatest pressure thereon, flexible separators 8 are provided in the interior of the band. These consist preferably of paper or pasteboard or other flexible material. The end of the hollo'w chamber ends in a part 9 formed as a lip valve. The air is compressed in the chamber 1 when the latter is trodden on bv the foot and thus closes the valve so that the air cannot again escape from the chamber. The outlet valve 10 is formed as a lip valve in similar manner to the inlet valve 9. It is arranged in the packing strip 4 between the walls 2 and 3 and connects with .a cell 11 which communicates with the space inside the boot through apertures 12.

A hollow band 13 connected with the shoe sock and removable together with the latter from the shoe, serves forletting 011' the used air and this band at one end projects into a recess 14 (Figs. 2 and 4) of the sock which recess is shut off from the hollow part 1. In

this recess the old air of the boot space can come from all sides, for example, also through apertures 15 in the walls 2 and from there passes into grooves 16 in the band 13 through which it rises up between boot and foot and escapes over the edge of the boot into the open air. The band also like the band 6 has'spacing devices 8 in its interior which extend through the band. As shown in Fig. 4, the section of the spacing devices is provided with projecting edges 17 on which the spacing devices meet and support one another in order to maintain intact the section of passage.

If the resilient members 5 are formed of rubber they are preferably connected with one another by means of strings 18. The shoe insertion or sock may be formed as a whole sole, a halfsole or merely a heel sock.

I claim:

1. Ina shoe insertion the combination of a ventilating device, with a hollow band forming an air supply pipe connected with the device and removable with the latter from the shoe, and spacin -pieces of flexible non-compressible materia arranged in the interior of the said hollow band.

2. In a shoe insertion the combination of a ventilating device, with a hollow band forming an air supply pipe connected with the device and removable with the latter from the shoe, spacing-pieces of flexible noncompressible material arranged in the interior of the said hollow band, and a lip-valve formed of an end of the said band and arformed of an end of the said band and arranged in the interior of the said device, and ranged {in the interior of the said device. air-outlet-devices connected with the said 3. In a shoe insertion the combination of device. I

6' a ventilating device, with a hollow ,band' In testimony whereof I have affixed my 15 forming an an supply ipe connected with signature in presence of twowitnesses.v

the device and remova le with the latter v RUDOLF LACK. from the shoe, spacin -pieces of flexible 'non- Witnessesr compressible mate'ria arranged in the inte- HENRY HASPER,

, 1'0 rior of the said hollow bend, "i lip-valve Womzm 

